I've only been to DC a few times since I bought the passport, we used to live in NJ and went there more often. However, even though I had my passport the last time, it wasn't easy for me to find all of the places mentioned in the book! I'm glad they do exist, and I'll have to give it another try!!!
You can get quite a few stamps in Yellowstone!

..and then Grand Teton NP is also right there and lovely, and so different than Yellowstone. The difference is not only in the scenery, but also in the outlook of the rangers. Just one little point, in Yellowstone all of the rangers were very quick to call the animals Bison, it was definitely not buffalo, but in Grand Teton, they were most likely to be referred to as buffalo! We chuckled every time we heard the reference. We had been to Yellowstone first, and the word buffalo had been drilled out of our vocabulary. We finally made it there this September, and we are so glad we did. We flew into Jackson Hole airport.
Bobbi
Just for info, every
Visitor Center has its own passport stamp. So, at EVER for example, we have five stamps: Coe Visitor Center, Royal Palm, Flamingo, Shark Valley, and Everglades City. Places like D.C., Philadelphia, and Boston, you can rack up a
bunch of stamps in a very short time.
Also, if you forget your passport, most visitors centers have little squares of blank paper that you can stamp and glue in your Passport.
Bison: Bison are bison. To be technically correct, they are American Bison
(bison bison), and there are two subspecies: Plains Bison
(bison bison bison) or Woods Bison
(bison bison athabascae) -- and I'm not making this up! They're NOT buffalos, no matter what someone calls them. Rangers are not infallible. In fact, we are SO fallible, we have a name for stuff we make up -- Ranger Lore!
You'll get name differences no matter where you go. Usually they are local names for subspecies, like cougar, mountain lion, puma, panther. But some of them just plain wrong...like buffalo.
For example, here in the Everglades we have a bird that gets renamed every 3-4 years. It used to be called the Green Heron. Then it became the Little Green Heron (there is no BIG green heron). Then it became the Green-backed Heron (its back is actually sorta blue, the wings are sorta green...sometimes). Currently, it's back to Green Heron in most bird books, but you'll hear it called just about anything.